Mitsuru Kirijo is an 18-year-old female. Mitsuru has waist-length red hair that has bangs covering the left side of her face. Mitsuru's eyes are brown. She has fair skin and is 5'5".

Mitsuru is calm, confident, mature, responsible, wise and very intelligent. Mitsuru acts serious, but if you embarrass her, she'll be quite flustered and get annoyed at you. Mitsuru is shown to be quite awkward when dealing with normal social situations and can be rather shy at times, likely due to her upbringing.